Brightness Variations of the Background Emission

Details Brightness Variations of the Background Emission Brightness Variations of the Background Emission

Jun 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996ge%26ae..36..190v&link_type=abstract

Geomagnetism and Aeronomy, Vol. 36, p. 190-194

Physics

Diffuse Aurora, Substorm Growth Phase, Zenith Photometer.

Scientific paper

The brightness of the background emission was measured at the Yakutsk and Noril'sk meridional chains of stations equipped with zenith photometers. These measurements are used to analyze the spatio-temporal brightness distribution of the diffuse aurora during the substorm growth phase over a wider geomagnetic-latitude range than studied in [Geomagn. Aeron., 1995]. The background brightness is shown to increase monotonically at the sub- storm activation meridian both near the equatorward and the poleward edge of the diffuse precipitation region. It is shown that both the activation latitude and longitude of a future substorm can, in principle, be determined several tens of minutes before the onset of the expansion phase.

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